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Last week Elaine earned $$ $140$$ working at a store, and an additional $$ $10$$ per hour for making deliveries for the store. She spent $$ $3$$ for gasoline for every $$2$$ hours that she made deliveries. Last week, after deducting the amount she spent for gasoline, Elaine earned $$ $242$$. For how many hours did Elaine make deliveries for the store last week?
______hours

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